class oldPhone:
    def call (self):
        print('旧手机——打电话')
    def massage (self):
        print('旧手机发短信')
    def show (self):
        print('收旧手机')


class Computer:
    version = 2
    def office(self):
        print('做文档')

    def show(self):
        print('电脑')

class newPhone(oldPhone,Computer):
    def massage(self):
        super().massage()
        print("新手机")
    def net(self,work):